Why do some variables in your examples begin with the ` character?
If you begin a variable's name with the ` character, the variable will not be shown in the results text box.
One technique we use when working with Numera is to use unique variable names. Then if at some point we decide we don't want to see a variable in the results box, we do a find and replace (Ctrl+H) and replace the variable with a variable that begins with the ` character. For example, if we're using a variable called indexer, we would replace it with `indexer.